Pirates sign Mientkiewicz to minor leage deal

Pirates signed Doug Mientkiewicz to a minor league contract.  I'm almost speechless at how pointless that seems.  Is he gonna be Pearce's backup in Indy?  He'd better not hit the majors before Pearce does, and if he's supposed to be 1B backup for LaRoche, what about Nady and Doumit as well as Pearce?  Only way this makes any sense is if it's a setup for a trade, but I can't even see that happening...who would we trade away that we'd need him?  LaRoche AND Nady?  Doubtful.  Anyone have any insight?

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